This incident started around 4:45 a.m., at a Tim Hortons in the Sheppard Avenue East and Yorkland Boulevard area of Toronto.
According to a press release, the suspect Toronto Police are now trying to identify approached the Tim Hortons drive-thru window on foot and asked for a coffee.
"An argument ensued as the suspect was not in a vehicle," police said, and added that the Tim Hortons employee eventually allowed the suspect to purchase the coffee in the drive-thru window because she, "did not want to escalate the situation."
What ensued was the employee having the hot coffee thrown at her, which police said caused "severe burns to her arm and back," which they said also required medical attention.
The alleged suspect then ran away.
Police have since released surveillance images of the man and have described him as being 30 to 35 years old, 5'8", with a thin build, and medium-long curly hair to his neck.
Surveillance images of the suspect wanted in an assault at a Toronto Tim Hortons.Toronto Police Service
TPS added the man was also wearing white clothing and a black jacket at the time of the incident.
He is wanted in the incident which police have described as an aggravated assault and an assault with a weapon.
Toronto Police have asked anyone with information in the incident to contact them at 416-808-3200, or Crime Stoppers anonymously at 416-222-TIPS (8477), or at www.222tips.com.
This isn't the first time we've heard about a case of severe burns connected to a Tim Hortons hot drink being spilled.
In March, an Ontario woman launched a lawsuit against Tim Hortons after a drive-thru tea spill left her with "horrific" injuries.
This article's right-hand cover image was used for illustrative purposes only.
Tim Hortons on 1167 Queen Street West.
Exclusive favourites at Tim Hortons.
Tim Hortons Donuts.
Nitro Draft Latte.
Espresso machine at Tim Hortons.
Nitro coffee on top at Tim Hortons.
A section of the seating area in the 375 King Street West Tim Hortons location.
Hockey field print on a table.
Seating area at Tim Hortons on the 1167 Queen Street West location.
Tim Hortons at 1167 Queen Street West.
Urban Location Tim Hortons.
Pictures shared on a Facebook group of Tim Horton's sign.
Burns to Lansing's stomach and legs. Gardiner Roberts LLP